Gearless elevator:
• Switch the main power OFF. Open the machine
brake manually and let the car accelerate to
the tripping speed of the overspeed governor.
The overspeed governor should trip, which will
engage the safety gear and stop the car.
Do not let the car run on the buffer.
Geared elevator:
• Accelerate the car with the hoisting motor to
the nominal speed, keep the machine brake
open manually, switch the main power OFF
and let the car accelerate to the tripping speed
of the overspeed governor. The overspeed gov-
ernor should trip, safety gear engage and car
stop. If the car does not stop after 1-2 seconds
close the brake immediately.
Do not let the car run on the buffer.
• Try to drive the car down to check that the
safety gear has engaged (suspension ropes
should slip on the traction sheave).
4.2.2
Gripping test for counterweight safety
gear
Always check that the filler weights are
secured in place before the test.
Method C1 - Gripping test with nominal speed
or lower
-
empty car
-
counterweight frame loaded with required
number of filler weights
-
gripping speed = nominal speed or lower
• Secure the car safety gear by tying the safety
gear lever up. This prevents unintended grip-
ping of the car safety gear due to jumping of
the car.
• Drive the counterweight down with nominal
or lower speed and keep the machine brake
manually open.
• After reaching the test speed activate the trip-
ping function of the overspeed governor.
• If the car does not stop after 1-2 seconds close
the brake immediately.
• Try to drive the counterweight down to check
that the safety gear has engaged (suspension
ropes should slide on the traction sheave).
Method C2 - Gripping test with overspeed
-
empty car
-
counterweight frame loaded with required
number of filler weights
-
gripping speed = tripping speed of the over-
speed governor
Always ensure that the travelling height is
high enough to keep the counterweight
from running onto the buffer.
With geared elevators, if the elevator does
not accelerate to the tripping speed of the
overspeed governor, test the safety gear
with nominal speed (according to test
method C1).
• Secure the car safety gear by tying the safety
gear lever up. This prevents unintended grip-
ping of the car safety gear due to jumping of
the car.
Änderungen vorbehalten!
Subject to change without notice!
© WITTUR – All rights reserved
Progressive Type Safety Gear
CSGB-01C
Operating instructions
Blatt/
sheet
PM.7.003609.EN.015
Datum/
date
14.07.2016
Stand/
version
Geprüft/
approved
WAT/MZE
A-02.05.2017
